The title compound, C(14)H(4)Cl(4)FNO(2), has crystallographic twofold symmetry with the N and F atoms and two C atoms of the benzene ring located on a twofold rotation axis. The isoindole-dione ring system is almost planar [maximum atomic deviation = 0.036 (3) Å], and is twisted with respect to the florobenzene ring, making a dihedral angle of 58.56 (16)°. Weak inter-molecular C-H⋯Cl hydrogen bonding is present in the crystal structure.